<template>
	<div>
		<!-- 面包屑导航区域 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
		  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
		  <el-breadcrumb-item>权限管理</el-breadcrumb-item>
		  <el-breadcrumb-item>角色列表</el-breadcrumb-item>
		</el-breadcrumb>
		
		<!-- 卡片视图 -->
		<el-card>
			<!-- 添加角色按钮区域 -->
			<el-row>
				<el-col>
					<el-button type="primary">添加角色</el-button>
				</el-col>
			</el-row>
			
			<!-- 角色列表区域 -->
			<el-table :data="rolelist" border stripe>
				<!-- 展开列 -->
				<el-table-column type="expand">
					<template slot-scope="scope">
						<el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
							<!-- 渲染一级权限 -->
							<el-col :span="5">
								<el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
								<i class="el-icon-caret-right"></i>
							</el-col>
							<!-- 渲染二级和三级权限 -->
							<el-col :span="19">
								<!-- 通过 for 循环 嵌套渲染二级权限 -->
								<el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
									<el-col :span="6">
										<el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
										<i class="el-icon-caret-right"></i>
									</el-col>
									<el-col :span="18">
										<el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
									</el-col>
								</el-row>
							</el-col>
						</el-row>
						
						<!-- <pre>{{scope.row}}</pre> -->
					</template>
				</el-table-column>
				<!-- 索引列 -->
				<el-table-column type="index"></el-table-column>
				<el-table-column label="角色名称" prop="roleName"></el-table-column>
				<el-table-column label="角色描述" prop="roleDesc"></el-table-column>
				<el-table-column label="操作" width="300px">
					<template slot-scope="scope">
						<el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
						<el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
						<el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
					</template>
				</el-table-column>
			</el-table>
		</el-card>
		
		<!-- 分配权限的对话框 -->
		<el-dialog
		  title="分配权限"
		  :visible.sync="SetRightDialogVisible"
		  width="50%" @close="SetRightDialogClosed">
			<!-- 树形控件 -->
		  <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="SetRightDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="allotRights">确 定</el-button>
		  </span>
		</el-dialog>
	</div>
</template>

<script>
	export default {
		data() {
			return {
				// 所有角色列表数据
				rolelist: [],
				// 控制分配权限的对话框显示与隐藏
				SetRightDialogVisible: false,
				// 所有权限的数据
				rightslist: [],
				// 树形控件的属性绑定对象
				treeProps: {
					label:'authName',
					children: 'children'
				},
				// 默认选中的节点ID值数组
				defKeys: [],
				// 当前即将分配权限的角色id
				roleId:[]
			}
		},
		created() {
			this.getRolesList()
		},
		methods: {
			// 获取所有角色的列表
			async getRolesList() {
				const {data: res} = await this.$http.get('roles')
				
				if (res.meta.status !== 200) {
					return this.$message.error('获得角色列表失败！')
				}
				
				this.rolelist = res.data
				console.log(this.rolelist);
			},
			// 根据Id删除对应的权限
			async removeRightById(role, rightId) {
				//弹框提示是否删除
				const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
				          confirmButtonText: '确定',
				          cancelButtonText: '取消',
				          type: 'warning'
				        }).catch(() => {
									// catch(err => err)
									this.$message({
										type: 'info',
										message: '已取消删除'
									});
								});
								
								
								// if (confirmResult !== 'confirm') {
								// 	return this.$message.info('已取消删除')
								// }
								
								const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
								
								if (res.meta.status !== 200) {
									return this.$message.error('删除权限失败！')
								}
								
								// this.getRolesList()
								role.children = res.data
			},
			// 展示分配权限的对话框
			async showSetRightDialog(role) {
				// 获取所有权限的数据
				this.roleId = role.id
				const {data: res} = await this.$http.get('rights/tree')
				if (res.meta.status !== 200) {
					return this.$message.error('获取权限数据失败！')
				}
				
				// 获取到的权限数据保存到data中
				this.rightslist = res.data
				console.log(this.rightslist);
				
				// 递归获得三级节点id
				this.getLeafKeys(role, this.defKeys)
				this.SetRightDialogVisible = true
			},
			//通过递归的形式，获取角色下所有三级权限的id,并保存到defKeys数组中
			getLeafKeys(node, arr) {
				//如果当前node 节点不包含children属性，则是三级节点
				if (!node.children) {
					return arr.push(node.id)
				}
				
				node.children.forEach(item => this.getLeafKeys(item,arr))
			},
			// 监听分配权限对话框的关闭事件
			SetRightDialogClosed() {
				this.defKeys= []
			},
			// 点击确认按钮为角色分配权限
			async allotRights() {
				const keys = [
					...this.$refs.treeRef.getCheckedKeys(),
					...this.$refs.treeRef.getHalfCheckedKeys()
				]
				
				console.log(keys);
				
				const idStr = keys.join(',')
				
				const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, { rids:idStr})
				
				if (res.meta.status !== 200) {
					return this.$message.error('分配权限数据失败！')
				}
				
				this.$message.success('分配权限成功！')
				this.getRolesList()
				this.SetRightDialogVisible = false
			}
		} 
	}
</script>

<style lang="less" scoped>
	.el-tag {
		margin: 7px;
	}
	
	.bdtop {
		border-top: 1px solid #eee;
	}
	
	.bdbottom {
		border-bottom: 1px solid #eee;
	}
	
	.vcenter {
		display: flex;
		align-items: center;
	}
</style>